Within the Sonic franchise's fictional universe, Shadow is an artificial, anthropomorphic black hedgehog created 50 years before titular character, Sonic the Hedgehog was born, by Professor Gerald Robotnik, the grandfather of series antagonist Doctor Eggman. After witnessing the death of his best friend Maria, Shadow vows to keep his promise but had got memories changed from Gerald Robotnik to enact his plan to destroy the world and he remembered his promise to Maria Robotnik that he would prote